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By W. Smykatz-Kloss

ISBN-10: 3642659519

ISBN-13: 9783642659515

ISBN-10: 3642659535

ISBN-13: 9783642659539

At first look it can appear presumptuous to need so as to add another to the various books on Differential Thermal research (DT A). Thermoanalytical equipment were in use for a while, as proven by means of the greater than 5 thousand guides containing DT A or TG curves indexed by means of SMOTHERS and CHIANG within the bibliography to their guide and abstracted within the numerous volumes of Thermal research Abstracts (TAA), edited via J. P. REDFERN for the overseas Con­ federation for Thermal research (ICT A). each 3 years the continue­ ings of ICT A conferences are released, bringing the newest result of thermoanalytic examine. there's additionally the Scifax DT an information Index, edited by means of R. C. MACKENZIE (1962) and modeled at the ASTM trend card index (used for X-ray investigations), a compilation of the DT a knowledge for numerous hundred minerals, and inorganic and natural fabrics. The theoretical foundations of thermogravimetry and DT A were defined intimately by way of LEHMANN, DAS and PAETSCH (1953), R. C. MACKENZIE (1957, 1970), DUVAL (1963), WENDLANDT (1964), GARN (1965), F. PAULIK et al. (1966), SMOTHERS and CHIANG (1966), and KEATTCH (1969). Thermoanalytical effects are strongly inspired by way of different factors relative to practise and gear (see 1-2. four of this study). because of this why we regularly locate, in those books in addition to within the Scifax-Card catalog, contradictory info at the comparable substance.

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Application of Differential Thermal Analysis t rOC] 400 350 300 250 5 10 50 100 [mg] Fig. 14. 3 Soils and Iron Ores Soils are weathering products not having been transported. Their main components are clay minerals (kaolinite, montmorillonite and so on), and hydroxides of iron and aluminum. These hydroxides are mostly badly crystallized and generally very fine grained. Some of them are used as iron ores (brown ore, bean ore). The "braune Glaskopf' (Table 8) consists of hematite and nearly 5% badly crystallized lepidocrocite, the "laterite" from Vogelsberg of gibbsite and well-ordered kaolinite (on order-disorder of kaolinites see III -6), the bauxite from Georgia consists of a mixture of gibbsite (>95%) and diaspore; the bean ore fromTuttlingen consists of well-crystallized goethite ("" 20%), detrital quartz ( "" 20%) and well-ordered kaolinite, the oolitic iron ore from Westphalia mainly of badly-crystallized goethite and a little well-ordered kaolinite, and lastly the "white iron ore" from Sulzbach-Rosenberg/Bavaria of detrital quartz, some disordered kaolinite and two goethites different in their degree of crystallization (peaks at 262 and 370 C).

J QI 0. 3. Determination of equilibrium temperatures by varying the heating rate. (After TANAKA, from SCHULTZE) 20 Part 1. 2 Heat of Reaction, AH About the theoretical background of the A H -determination see ARENS, SCHULTZE, MACKENZIE, GARN, WENDLANDT or LUGSCHEIDER, After caloric calibration of the DT A apparatus either by simultaneous calibration or by measuring the melting temperatures of some metals with well-known heats of reaction (see WIEDEMANN and VAN TETS), the factor of proportionality K = supplied additional amount of heat peak area has to be determined by electric calibration (compare SCHULTZE, p.

They show dehydration peaks similar to those of 36 Part II. Application of Differential Thermal Analysis Table 5. DT A data of some sulfates (in dc) Mineral, formula Gypsum, CaS04· 2 H 2O Gypsum, CaS04 . 2 H 2O Gypsum, CaS04 . 2 H 2O Gypsum, CaS04 . 2 H 2O Gypsum, CaS04 . g. the alunite, see KASHKAI and BABAEV and Table 5), or structural transformations like anglesite (89,5° C, McLAUGHLIN) or thenardite which can be recognized at three reversible structural changes, at 147,215, and 245 C (see Fig.

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Differential Thermal Analysis: Application and Results in Mineralogy by W. Smykatz-Kloss

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